ME139.pdf - RETURN ME139 Exhaust Gas Economizer Circulating Water Deficiency and Boiler Water Contents Instability Technical committee 1 Summary After

ME139.pdf - RETURN ME139 Exhaust Gas Economizer Circulating...

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1 The Marine Engineer Jun.1990 ME139 Exhaust Gas Economizer Circulating Water Deficiency and Boiler Water Contents Instability Technical committee 1. Summary After replacing the exhaust gas economizer (E.G.E.), operation was recommenced. However from around this period, boiler water contents became unstable. Although inspections were conducted of each part, a definite cause was not discovered. During stop, the E.G.E was inspected for leakage, and a crack was discovered to the newly replaced evaporating tube. Although a blank plug was installed in the concerned tube, boiler water contents did not stabilize following installation and the water color continued to become mired. After departing port, boiler water analysis was carried out while augmenting the E.G.E. load. An E.G.E. high pressure circulation water deficiency was presumed. At the next port of anchorage, when cleaning of the Y-type strainer with E.G.E and line blowing using the high pressure inlet pipe using boiler pressure was conducted, accumulated boiler sludge gushed out.
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